A diver wearing a Santa Claus costume feeds to a school of fish during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)

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A diver wearing a Santa Claus costume feeds a beluga, or white whale, and a seal during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)

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A diver wearing a Santa Claus costume feeds a beluga, or white whale, and a seal during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)

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A diver wearing a Santa Claus costume feeds a beluga, or white whale, and a seal during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)

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A diver wearing a Santa Claus costume feeds a beluga, or white whale, during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)

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Cape penguins wearing scarves walk with a trainer in a Santa Claus costume during a Christmas show at the Hakkeijima Sea Paradise aquarium in Yokohama, suburban Tokyo, on December 17, 2009. (AFP/Yoshikazu Tsuno)